Redo ReadSaveBuf + common.h cleanup

src/vehicles/Automobile.cpp

@@ -45,6 +45,7 @@
 #include "Object.h"
 #include "Automobile.h"
 #include "Wanted.h"
+#include "SaveBuf.h"
 
 bool bAllCarCheat;	// unused
 
@@ -4724,7 +4725,7 @@ void
 CAutomobile::Load(uint8*& buf)
 {
 	CVehicle::Load(buf);
-	Damage = ReadSaveBuf<CDamageManager>(buf);
+	ReadSaveBuf(&Damage, buf);
 	SkipSaveBuf(buf, 800 - sizeof(CDamageManager));
 	SetupDamageAfterLoad();
 }